The Accelero S1 Rev 2 is certainly cheaper even if I include a Nexus fan in the price. The modding required to fit it on the 5850 seems easy enough even for me. But I have read it might have trouble cooling the VRM:s so the card throttles the clocks while playing. Any thoughts on this?
I can only speak from my experience, but I can say I have never had this issue.
As a little background I should say my 5850 is a Sapphire Vapor-X which has a slightly different PCB layout and has a VRM heatsinks attached (the bottom card in this pic):http://images.anandtech.com/reviews/vid ... ompare.jpg
However it you attach the VRM heatsinks I doubt you will have any issues as I believe an Accelero S1 with a nexus fan attached will be pushing more air over your VRMs than the little fan on your stock cooler did.
Sadly my card does not have any VRM temperature probes so I cannot give you exact temps however I did a little benchmarking before and after attaching the Accelero which clearly show no throttling. I benchmarked my cards at quite a high overclock with the following results:
Clock Speed: 875MHz
Memory Speed: 1125MHz
Max GPU Temp (Vapor-X): 72 deg
3DMark (Vapor-X): 15764http://i779.photobucket.com/albums/yy78 ... X_OC-1.png
Max GPU Temp (Accelero S1): 61 deg
3DMark (Accelero S1): 15768http://i779.photobucket.com/albums/yy78 ... 1_OC-1.png
So you can see that no throttling occurs (essentially the same 3DMark) however my core temp is significantly reduced. And the Vapor-X cooler is pretty good as it is, a stock cooler would probably be at 80-90deg at those clocks.
One thing to watch out for with the Accelero S1 is that (I believe) it becomes 3-slot if you mount a 25mm fan under it. Can anyone confirm this?
Correct (I think). I will check my PC tonight. You could use a 12mm fan to make it dual slot I think?